4G5GWorld has a new home now. Visit TelecomGrid for new stories and blogs!
S-GW to S-GW tunnel
Posted on 27. Mar, 2013 by luca
in LteWorld Forum
I am studying the possibility to deploy a network-based Distributed Mobilityi Management (DMM) solution in LTEi but a tunnel between Serving GW (where the distributed mobility anchoring function will be placed) is needed when the UEi performs intra E-UTRANi handover on the S1i interface (X2i HO is not available).
The question therefore is:
is it possible to establish a user plane tunnel between two Serving GWs?
Or is it mandatory to go through the PDN GW via the S5i/S8i interface and then again from the PDN GW to the target Serving GW?
Thanks in advance, I hope it is clear enough.
Indirect Data Forwarding Tunnel
might have found a solution myself: GTP-based Indirect Data Forwarding Tunnel.
This tunnel is established between source S-GWi and target S-GW during S1i-based handover that needs a S-GW relocation.
For Inter-RATi HO, in case of
For Inter-RATi HO, in case of indirect forwarding as well a tunnel will be established in between S-GWi and target S-GW.